In filtration, there is a precision filter, which is also called a security filter. It is widely used in prefiltration and filtration, which can effectively remove contaminants from water. This blog aims to introduce this precision filter to you, and help you know more about water treatment

What is precision filter

What is the precision filter?

Precision filter (also called security filter), the housing is made of high quality 304 or 316 stainless steel, can be installed with different specifications and models of filter elements, such as: PP melt-blown filter cartridge, string wound filter cartridge, activated carbon filter cartridge, etc.


Due to its characteristics of large filtering surface, fast speed, non-clogging, and ease to use, therefore, widely used in pretreatment and final filtration of various industries. Precision filters are available in quick-open type, flange type, and clamping type.

Characteristics of precision filter

The precision filter has a perfect appearance, simple and reasonable structure, polished inside and outside.

Not only good at appearance but also good at filtration, it has a large filtering area, fast filtration speed, low clogging rate, acid, and alkali corrosion resistance, and long service life. At the same time, the precision filter has a lower cost, a small footprint, and a large filtration surface.

Characteristics of precision filter

With different types and micron ratings inside filter cartridges, the precision filters can remove all kinds of tiny particles, colloids, metals, bacteria, residual chlorine, and other impurities from the liquids.

  • Able to withstand high filtration pressure can effectively remove suspended matter, rust, etc. in the liquid
  • Cartridges can be made from a variety of materials to suit a variety of fluid filtration needs
  • Small footprint, large filtration area, low resistance, and long service life
  • Resistant to acids, alkalis, and other chemical solvents
  • With high filtration precision, the uniform pore size of the cartridge, high strength, and high-temperature resistance, the cartridge is not easy to deformation

Working principle of precision filter

The precision filter is made of formed filter material. Under the effect of pressure, the original liquid passes through the filter material, the filter residue remains on the wall of the filter material, and the filtrate flows out through the filter material, which can effectively remove impurities, sediment, suspended matter, and bacteria from the water.

It can effectively remove impurities, sediment, suspended matter, and bacteria from the water, thus achieving the purpose of filtration.

Working principle of precision filter

Formed filter materials include filter cloth, filter mesh, filter sheet, sintered filter tube, string wound filter cartridge, melt blown filter cartridge, microporous filter cartridge and multifunctional filter cartridge.

Due to the different materials, the filtration pore size is also different. Precision filtration is a kind of filtration between sand filtration (coarse filtration) and ultrafiltration, and the filtration pore size is generally in the range of 0.1-120μm.

The Classification of precision filters for water treatment

The precision filter is mainly divided into B, C, and D grade precision filters, according to the different types and grades, its main applications are not the same.


Class B, and C precision filter is mainly used in environmentally-friendly fiber and non-woven fabric materials; Class D filter is similar to activated carbon filter, mainly used in pharmaceutical, food, water treatment, petroleum, printing, and other industries. Of course, it is also the ideal equipment for all kinds of liquid filtration.

The performance of the precision filter

The performance of precision filter
  • The oil& gas in compressed air can be filtered to 0.5ppm. At the same time, impurities are filtered to 5 Micron
  • Oil and gas can be removed to 0.01ppm; And the impurities in the air can reach 0.01Micron
  • Able to remove the ozone in the compressed air, ultra-fine particles, and even imperceptible particles in oil & gas

The application of precision filter

According to the characteristics mentioned above, the precision filter is suitable for pharmaceutical, chemical, food, beverage, water treatment, brewing, petroleum, printing and dyeing, environmental protection, and other industries. It is the ideal equipment for all kinds of liquid filtration, clarification, and purification treatment.

The application of precision filter

How to choose a precision filter for water treatment

Based on the requirement of sustainability, water issues have repeatedly become the focus of attention. More and more governments and enterprises pay attention to water treatment, and a precision filter is undoubtedly a perfect assistant.

How to choose precision filter for water treatment

Here we want to recommend some efficient precision filters for you, which are High flow filter, depth filter cartridges, Stainless Filter Housing, and Plastic filter housing.

Brother Filtration has years of filtration experience, and designs and manufactures all kinds of high-quality filter products, fulfilling the needs of various industries. If you have further questions about the precision filter or any questions about filtration, please feel free to contact us.

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